Layer 2 VPN Architectures

Appendix 1. L2TPv3 AVP Attribute Types

This appendix presents a comparison between the Attribute-Value Pair (AVP) attribute types that Cisco routers use prior to the Internet Assigned Numbers Authority (IANA) assignment of the values and the IANA assigned values. The message types in which those AVPs are present are also included (see Table A-1).

Table A-1. Comparing L2TPv3 AVP Attribute Types

AVP Name	Cisco AVP	IETF[1] AVP	Messages
Extended Vendor ID AVP	N/A	58	All messages
Message Digest	12	59	All messages
Router ID	N/A	60	SCCRQ[2], SCCRP[3]
Assigned Control Connection ID	1	61	SCCRQ, SCCRP, StopCCN[4]
Pseudowire Capabilities List	2	62	SCCRQ, SCCRP
Local Session ID	3	63	ICRQ[5], ICRP[6], ICCN[7], CDN[8], WEN[9], SLI[10]
Remote Session ID	4	64	ICRQ, ICRP, ICCN, CDN, WEN, SLI ...